634889946407 has 4 divisors (see below), whose sum is σ = 640823497416. Its totient is φ = 628956395400.

The previous prime is 634889946389. The next prime is 634889946419. The reversal of 634889946407 is 704649988436.

634889946407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634889946407 - 2¹² = 634889942311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634859946407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966775344 + ... + 2966775557.

It is an arithmetic number, because the mean of its divisors is an integer number (160205874354).

Almost surely, 2^634889946407 is an apocalyptic number.

634889946407 is a deficient number, since it is larger than the sum of its proper divisors (5933551009).

634889946407 is a wasteful number, since it uses less digits than its factorization.

634889946407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5933551008.

The product of its (nonzero) digits is 250822656, while the sum is 68.

The spelling of 634889946407 in words is "six hundred thirty-four billion, eight hundred eighty-nine million, nine hundred forty-six thousand, four hundred seven".